code: def testName(self, metric_class, fn, expected_name):
      metric = metric_class(fn)
      self.assertEqual(expected_name, metric.name)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import parameterized
  import tensorflow
  from tf_agents.bandits.metrics import tf_metrics
  from tf_agents.bandits.policies import constraints
  from tf_agents.specs import tensor_spec
  from tf_agents.trajectories import time_step
  from tf_agents.trajectories import trajectory
label_desc: Use image node_id 5 for calling the TFMetricsTest obj's underlying member method code with example usage: obj.testName(metric_class, fn, expected_name) without return types